Door lock



Nov. 18, 1941. H. cs. VOIGHT DOOR LOCK Filed Dec. 20, 1940 2 Sheets-Sheet l Nov. 18, 1941. H; G, WIGHT 2,263,477

DOOR LOCK Filed Dec. 20, 1940 2 Shee ts-Sheet 2 Patented N... s, 1941 UNITED STATE noon LOCK Henry G. Voight, New Haven, Conn" asslgnor to Sargent & Company, New Haven, Conn., a corporation of Connecticut Appllcation'December 20, 1940, Serial No. 370,982

' ture shown in that patent.

,2 Claims.

This invention relates to door locks, and more particularly to a so-called tubular lock wherein the mechanism is placed within a case of tubular form which may be inserted withina cylindrical opening bored through the edge face of the door in order to avoid the more tedious mortising operations usually employed to provide an opening to receive the more or less common rectangular lock case.

The invention also particularly relates to a lock for a door such as a bathroom door, for example, which lock is provided with means for clogging the bolt from one side of the door so that it cannot be opened from the other side. A look of this type is shown in the Voight and Edwards Patent No. 2,220,591 of November 5, 1940, and the present construction represents an improvement in certain respects over the struc- In the patent referred to a push button is provided which projects through one of the knob roses for operation, and which button is provided with a member operating within the case to dog one of the knob rollbacks against operation. The dogging member is held in operative 'position, and when the latch bolt is released is returned 'to inoperative position by a spring provided for that purpose. guishes from that of the patent referred to in that the dogging member is frictionally held in operative or inoperative position afwr being placed in either of these positions, but is positively forced or-moved to inoperative position when the latch bolt is operated.

In other words, in the present structure it is not necessary to depend on a spring to move the dogging member to inoperative position when the latch bolt is retracted from the inside to open the door, but on the other hand the dogging member will be positively thrown to inoperative position by the operation of the latch so that there will be no likelihood of its remaining in its dogging position to dog the latch against operation if the door is again closed.

One object of the invention is to provide a door lock of the character described of improved operation and of simple construction.

A further object of the invention is the provision of a door lock having a knob-dogging mechanism operablefrom one side of the door, so arranged that when the latch is retracted the dogging mechanism will be positively moved to inoperative position.

A still further object of the invention is the provision of a door lock having a tubular case, and a dogging member mounted between the walls of the case to positively dog one ofthe knobs against operation, together with means for-holding the dogging member in operative position, and cooperating means on the dogging The present construction distinmember and on the stem or yoke of the latch bolt to positively move the dogging member to inoperative position when the latch is retracted.

To these and other ends the invention consists in the novel features and combinations oi. parts to be hereinafter described and claimed.

In the accompanying drawings:

Fig. 1 is a front elevational view of a portion of a door having mounted thereon a lock embodying my invention;

Fig. 2 is a face view of the parts shown in Fig.

Fig. 3 is a sectional view on line 3-3 of Fig. 2;

- Fig. 4 is aview of the lock case mounted within the door, the cover being removed to expose the operating mechanism;

Fig. 5 is a sectional view on line 5-5 of Fig. 4; Figs. 6 and 7 are views similarto Fig. 5 but showing the parts in different positions;

Fig. 8 is a perspective view or the latch bolt and stem or yoke secured thereto; and

Fig. 9 is a perspective view of the dogging member.

To illustrate a preferred embodiment of my in vention I have shown a portion of a door iii having mounted therein a lock case comprising a body portion II and a cover 52, the latter being secured in place by means of a screw E3 inserted through the cover and threaded into a post ll secured to the case body. Slidably mounted within the case is a latch bolt having the usual beveled head iii to which is secured a bifurcated stem or yoke having legs i6. A bolt spring I1 is disposed between the legs [6 of the yoke and acts against the rear portion of the bolt head and the post H to normally urge the latch bolt toward projected position. v

As shown in Fig. 8, the rear ends of the legs l6 of the yoke are turned laterally, as shown at it, which laterally projecting portions are adapted to be engaged by rollbacks i9 and 20 secured respectively to hubs 2| and 22 rotatably mounted in openings in the body portion and cover of the case.

These hubs are provided with non-circular openings and are adapted to receive the spindles 23 and 24 of the inner and outer knobs 25 and 26, the knobs being rotatably mounted in the roses 2'! and 28 in the usual manner. The spindles 23 and 24 are rotatably connected in that the outside spindle 24 is provided with internal threads 28 with which are engaged the threaded extension 29 of the inside spindle 23.

It will be seen, therefore, that while the spindles are prevented from relative longitudinal movement, each may be freely rotated relatively to the other, and as the non-circular or square portionof one spindle engages only the rollback at that side of the case, each knob operates its respecti e rollback and not the one engaged with the spindle of the other knob. Therefore, one of the knobs or one of the rollbacks may be dogged without interfering with the operation of the other, and the operation of either of the rollbacks will serve to retract the latch bolt. If desired, the extension 29 of the inner spindle may be carried to a point adjacent the surface of the outside knob, as shown in dotted lines at 39 in Fig. 3, so that if an emergency arises this spindle may be operated from the outside of the door, even though the outer knob 26 may be dogged against operation.

Slidably mounted between the walls of the lock case is a plunger element 39 having thereon a dog or lug 40 adapted when moved to operative position to lie within a notch or recess 4| provided in the rollback moved by the spindle of the outer knob. It will be noted from Fig. 3 that this rollback is of slightly greater dimensions than the inner rollback, so that the member 40 may be engaged therewith, but at the same time may be moved freely opposite the rollback IS without affecting its operation. Secured to the element 39 by the threaded stem 42 is a manually operable element or button 43, which extends through the inner rose 2! for manual operation.

As shown in Fig. 9, the plunger element 39 is provided with a boss 44 at one side thereof, which boss may be frictionally engaged by the bowed spring 45, shown more particularly in Fig. 3, in order that the element 39 will be frictionally held in the position shown in Fig. 3, or in the opposite extreme position shown in Fig. 6, in which it is operative to dog the outer knob against operation. One end of the spring 45 may be lodged in a recess 46 in the wall of the casing adjacent the post i4, so that the spring will be held against lateral movement, while the cover l2 of the case will engage the upper end of the spring and prevent it from becoming dislodged from the recess. Thus the spring may be very economically constructed and secured in place, and at the same time be a completely satisfactory means for holding the dogging element in either its operative or inoperative position.

The button 43 may be pushed inwardly or to the left, as shown in Fig. 3, in order to move the dog ing member to operative position, and may, if desired, be pulled outwardly by a manual operation to be restored to inoperative position. However, it is desirable to provide some means for restoring the dogging means to its inoperative position when the door is opened or closed.

To this end the plunger element 39 may be provided at either face thereof with laterally extending lugs having beveled surfaces 48, which lie closely adjacent the legs l6 of the latch yoke. Upon the legs of the latch yoke are provided inwardly extending bosses 49 having the lower inner comers thereof beveled, as shown at 59, in

a manner complementary to the beveled surfaces position, when the inner portion of the lugs 49 will merely pass freely over the surfaces 48.

The operation of the structure will be clear from inspection of Figs. 5, 6 and 7. In Fig. 5, for example, the latch bolt is extended and the dogging plunger 39 is in its outer inoperative position. It will be seen, therefore, that the lugs 49 will pass freely over the beveled surfaces 48. In Fig. 6 the dogging plunger has been moved inwardly so that the dogging member is engaged with the rollbock 20 so as to prevent operation of the outside knob. The inside knob is, of course, still free to turn. It will be apparent that if the latch bolt is retracted in the case the lugs 49 thereon will be moved rearwardly and the beveled surfaces 50 will engage the beveled surfaces 48 and cam the dogging member 49 outwardly to the position shown in Fig. 5.

In Fig. '7 of the drawings the action just referred to has taken place. In this figure the parts are shown in the position occupied when the latch bolt is in retracted position, either by the tuming of the inside knob or by engagement with the door strike when the door is closed. It will be seen that the lug 49 rides over the portion 48 so as to positively return the plunger 39 to its inoperative position. It will also be apparent from inspection of Figs. 5 and 6 that the lug 44 on the member 39 will be engaged by the bowed spring 45 so as to releasably hold the member 39 in the position to which it is moved.

While I have shown. and described a preferred embodiment of my invention, it will be understood that it is not to be limited to all of the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the appended claims.

What I claim is:

1. In a door latch, a casing, a latch bolt re- 4 ciprocably mounted therein, a retracting member for said bolt within the casing, inner and outer knobs, means connecting said member to said knobs for independent operation thereby comprising independently rotatable spindle sections one of which is connected to each knob, a dogging member slidably mounted in the walls of the eas- 4? ing and having means preventing operation of said retracting member by one of,the knobs, c0- operating means on said retracting member and said dogging member whereby retraction of the former moves the latter to inoperative position, and means frictionally holding said dogging member in operative dogging position, said means comprising a yieldablemember fixedly mounted between the walls of the casing and having an intermediate portion projecting toward the dogging member.

2. In a door latch, a casing, a latch bolt reciprocably mounted therein, a retracting member for said bolt within the casing, inner and outer knobs, means connecting said member to said knobs for independent operation thereby comprising independently rotatable spindle sections one of which is connected to each knob, a doggin member slidably mounted in the walls of the casing and having means preventing operation of said retracting member by one of the knobs, cooperating means on said retracting member and said dogging member whereby retraction of the former moves the latter to inoperative position, and means frictionally holding said dogging member in operative dogging position, said means comprising a bowed spring member fixedly mounted in the casing and projecting toward the dogging member to frictionally engage a part thereof.

HENRY G. VOIGHT. 

